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Li, J., Ni, X., & Leong, K. (2004). Block-Selected Molecular Recognition and Formation of Polypseudorotaxanes between Poly(propylene oxide)-Poly(ethylene oxide)-Poly(propylene oxide) Triblock Copolymers andα-Cyclodextrin. Angewandte Chemie, 116(25), 3277–3277. doi:10.1002/ange.200490081 
10.1002/ange.200490081